November 2010 Matamoros raid

The November 2010 Matamoros raid occurred on 5 November 2010 when 660 Mexican marines, 17 vehicles, and 3 helicopters launched a massive attack on the Gulf Cartel in the city of Matamoros in the state of Tamaulipas, which bordered the US state of Texas. The military faced heavily-armed and uniformed Gulf Cartel gangsters, and at least 300 grenades were detonated during the eight-hour operation, which saw heavy fighting in downtown. The Gulf Cartel leader Antonio Cardenas Guillen was killed in the heavy fighting, and anywhere from 47 to 100+ people were killed in one of Matamoros' bloodiest days as the Mexican armed forces destroyed the Gulf Cartel's presence in downtown Matamoros.